US3396510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid membranes for use in the separation of gases
Assignee: General Electric Co
•
Filing: 1966-08-15
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Granted: 1968-08-13
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Expires: 1986-08-15
Abstract
No abstract record available.
Inventors
- 👤 Iii William J Ward
- 👤 Walter L Robb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:46
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/38; B01D53/00; B01D53/22; Y; Y02; Y02C; Y02C20/00; Y02C20/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |